I will try to take more pictures as soon as I learn how to submit on this site, still new at it. One thing on the cannon: I use a hand spun fan instead of an electric fan. It works every time and is simple. Just a couple of spins and it shoots. I posted some drawings of it in the album section.

Instead of burst disks I punch out 1" plugs out of insulation board. They seal the barrel and than you can put anything in the barrel that fits. You can punch dozens in about 5 minutes and they are cheap made from scrap foam board. If anyone is interested I will take photos of the system.

The gun can be fired while moving as long as the passanger does it. The rifle is an old Lee enfield I think, it,s just for show. I am starting a new cannon out of aluminum however that will take a while. I will be using an aluminum air cylinder and adding on from there.